Não informado. (2022). US Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station.
Chicago-referens (17:e uppl.)Não informado. US Forest Service Resource Bulletin PNW. Portland, Ore: Pacific Northwest Forest and Range Experiment Station, 2022.
MLA-referens (8:e uppl.)Não informado. US Forest Service Resource Bulletin PNW. Pacific Northwest Forest and Range Experiment Station, 2022.
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